The invention discloses an automatic resin mixing system which comprises a bottom plate. A long plate is fixedly connected to the top of the bottom plate, a spray gun is fixedly connected to the rightside of the top of the long plate, a vertical plate is fixedly connected to the left side of the top of the long plate, and a vertical rod is fixedly connected to the right side of the top of the long plate; and the upper portion of the front end face of the vertical rod is rotationally connected with a convex block at the right side of the bottom of a box body through a pin shaft, the top of thevertical plate is attached to the left side of the bottom of the box body, a square box is fixedly connected to the top of the box body, and a stirring device is arranged at the left side of the boxbody. According to the automatic resin mixing system, through cooperation of the bottom plate, the spray gun, the vertical plate, the vertical rod, the long plate, the box body, the square box, a feeding opening and the stirring device, when the device is used, a first motor can drive a first gear to rotate, the first gear drives the long rod and a second gear to rotate, and the second gear drivesrotating teeth to rotate, so that automatic stirring and mixing of resin are realized, the automation degree is high, labor is saved, and the working efficiency is improved.